diff --git a/requirements.txt b/requirements.txt
index c639f5b..d5a6c3d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,5 +20,5 @@ SQLAlchemy-Enum34==1.0.1
 tornado==4.5.2
 tornado-redis==2.4.18
 transaction==2.4.0
-waitress==1.3.0
+waitress==1.4.1
 zope.sqlalchemy==1.1